diff --git a/third-party/proxygen/src/.github/workflows/getdeps_linux.yml b/third-party/proxygen/src/.github/workflows/getdeps_linux.yml
index 0d886a4caf1622..d1f5e3cfe4be46 100644
--- a/third-party/proxygen/src/.github/workflows/getdeps_linux.yml
+++ b/third-party/proxygen/src/.github/workflows/getdeps_linux.yml
@@ -18,96 +18,100 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v4
+    - name: Update system package info
+      run: sudo --preserve-env=http_proxy apt-get update
+    - name: Install system deps
+      run: sudo --preserve-env=http_proxy python3 build/fbcode_builder/getdeps.py --allow-system-packages install-system-deps --recursive proxygen && sudo --preserve-env=http_proxy python3 build/fbcode_builder/getdeps.py --allow-system-packages install-system-deps --recursive patchelf
     - id: paths
       name: Query paths
-      run: python3 build/fbcode_builder/getdeps.py query-paths --recursive --src-dir=. proxygen  >> "$GITHUB_OUTPUT"
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages query-paths --recursive --src-dir=. proxygen  >> "$GITHUB_OUTPUT"
     - name: Fetch ninja
       if: ${{ steps.paths.outputs.ninja_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests ninja
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests ninja
     - name: Fetch cmake
       if: ${{ steps.paths.outputs.cmake_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests cmake
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests cmake
     - name: Fetch zlib
       if: ${{ steps.paths.outputs.zlib_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests zlib
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests zlib
     - name: Fetch zstd
       if: ${{ steps.paths.outputs.zstd_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests zstd
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests zstd
     - name: Fetch boost
       if: ${{ steps.paths.outputs.boost_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests boost
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests boost
     - name: Fetch double-conversion
       if: ${{ steps.paths.outputs.double-conversion_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests double-conversion
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests double-conversion
     - name: Fetch fast_float
       if: ${{ steps.paths.outputs.fast_float_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests fast_float
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests fast_float
     - name: Fetch fmt
       if: ${{ steps.paths.outputs.fmt_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests fmt
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests fmt
     - name: Fetch gflags
       if: ${{ steps.paths.outputs.gflags_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests gflags
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests gflags
     - name: Fetch glog
       if: ${{ steps.paths.outputs.glog_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests glog
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests glog
     - name: Fetch googletest
       if: ${{ steps.paths.outputs.googletest_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests googletest
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests googletest
     - name: Fetch libdwarf
       if: ${{ steps.paths.outputs.libdwarf_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests libdwarf
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests libdwarf
     - name: Fetch libevent
       if: ${{ steps.paths.outputs.libevent_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests libevent
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests libevent
     - name: Fetch lz4
       if: ${{ steps.paths.outputs.lz4_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests lz4
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests lz4
     - name: Fetch snappy
       if: ${{ steps.paths.outputs.snappy_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests snappy
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests snappy
     - name: Fetch openssl
       if: ${{ steps.paths.outputs.openssl_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests openssl
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests openssl
     - name: Fetch liboqs
       if: ${{ steps.paths.outputs.liboqs_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests liboqs
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests liboqs
     - name: Fetch autoconf
       if: ${{ steps.paths.outputs.autoconf_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests autoconf
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests autoconf
     - name: Fetch automake
       if: ${{ steps.paths.outputs.automake_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests automake
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests automake
     - name: Fetch libtool
       if: ${{ steps.paths.outputs.libtool_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests libtool
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests libtool
     - name: Fetch gperf
       if: ${{ steps.paths.outputs.gperf_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests gperf
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests gperf
     - name: Fetch libiberty
       if: ${{ steps.paths.outputs.libiberty_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests libiberty
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests libiberty
     - name: Fetch libsodium
       if: ${{ steps.paths.outputs.libsodium_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests libsodium
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests libsodium
     - name: Fetch libunwind
       if: ${{ steps.paths.outputs.libunwind_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests libunwind
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests libunwind
     - name: Fetch xz
       if: ${{ steps.paths.outputs.xz_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests xz
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests xz
     - name: Fetch folly
       if: ${{ steps.paths.outputs.folly_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests folly
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests folly
     - name: Fetch fizz
       if: ${{ steps.paths.outputs.fizz_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests fizz
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests fizz
     - name: Fetch mvfst
       if: ${{ steps.paths.outputs.mvfst_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests mvfst
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests mvfst
     - name: Fetch wangle
       if: ${{ steps.paths.outputs.wangle_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests wangle
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests wangle
     - name: Restore ninja from cache
       id: restore_ninja
       if: ${{ steps.paths.outputs.ninja_SOURCE }}
@@ -117,7 +121,7 @@ jobs:
        key: ${{ steps.paths.outputs.ninja_CACHE_KEY }}-install
     - name: Build ninja
       if: ${{ steps.paths.outputs.ninja_SOURCE && ! steps.restore_ninja.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests ninja
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests ninja
     - name: Save ninja to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.ninja_SOURCE && ! steps.restore_ninja.outputs.cache-hit }}
@@ -133,7 +137,7 @@ jobs:
        key: ${{ steps.paths.outputs.cmake_CACHE_KEY }}-install
     - name: Build cmake
       if: ${{ steps.paths.outputs.cmake_SOURCE && ! steps.restore_cmake.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests cmake
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests cmake
     - name: Save cmake to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.cmake_SOURCE && ! steps.restore_cmake.outputs.cache-hit }}
@@ -149,7 +153,7 @@ jobs:
        key: ${{ steps.paths.outputs.zlib_CACHE_KEY }}-install
     - name: Build zlib
       if: ${{ steps.paths.outputs.zlib_SOURCE && ! steps.restore_zlib.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests zlib
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests zlib
     - name: Save zlib to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.zlib_SOURCE && ! steps.restore_zlib.outputs.cache-hit }}
@@ -165,7 +169,7 @@ jobs:
        key: ${{ steps.paths.outputs.zstd_CACHE_KEY }}-install
     - name: Build zstd
       if: ${{ steps.paths.outputs.zstd_SOURCE && ! steps.restore_zstd.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests zstd
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests zstd
     - name: Save zstd to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.zstd_SOURCE && ! steps.restore_zstd.outputs.cache-hit }}
@@ -181,7 +185,7 @@ jobs:
        key: ${{ steps.paths.outputs.boost_CACHE_KEY }}-install
     - name: Build boost
       if: ${{ steps.paths.outputs.boost_SOURCE && ! steps.restore_boost.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests boost
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests boost
     - name: Save boost to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.boost_SOURCE && ! steps.restore_boost.outputs.cache-hit }}
@@ -197,7 +201,7 @@ jobs:
        key: ${{ steps.paths.outputs.double-conversion_CACHE_KEY }}-install
     - name: Build double-conversion
       if: ${{ steps.paths.outputs.double-conversion_SOURCE && ! steps.restore_double-conversion.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests double-conversion
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests double-conversion
     - name: Save double-conversion to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.double-conversion_SOURCE && ! steps.restore_double-conversion.outputs.cache-hit }}
@@ -213,7 +217,7 @@ jobs:
        key: ${{ steps.paths.outputs.fast_float_CACHE_KEY }}-install
     - name: Build fast_float
       if: ${{ steps.paths.outputs.fast_float_SOURCE && ! steps.restore_fast_float.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests fast_float
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests fast_float
     - name: Save fast_float to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.fast_float_SOURCE && ! steps.restore_fast_float.outputs.cache-hit }}
@@ -229,7 +233,7 @@ jobs:
        key: ${{ steps.paths.outputs.fmt_CACHE_KEY }}-install
     - name: Build fmt
       if: ${{ steps.paths.outputs.fmt_SOURCE && ! steps.restore_fmt.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests fmt
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests fmt
     - name: Save fmt to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.fmt_SOURCE && ! steps.restore_fmt.outputs.cache-hit }}
@@ -245,7 +249,7 @@ jobs:
        key: ${{ steps.paths.outputs.gflags_CACHE_KEY }}-install
     - name: Build gflags
       if: ${{ steps.paths.outputs.gflags_SOURCE && ! steps.restore_gflags.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests gflags
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests gflags
     - name: Save gflags to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.gflags_SOURCE && ! steps.restore_gflags.outputs.cache-hit }}
@@ -261,7 +265,7 @@ jobs:
        key: ${{ steps.paths.outputs.glog_CACHE_KEY }}-install
     - name: Build glog
       if: ${{ steps.paths.outputs.glog_SOURCE && ! steps.restore_glog.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests glog
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests glog
     - name: Save glog to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.glog_SOURCE && ! steps.restore_glog.outputs.cache-hit }}
@@ -277,7 +281,7 @@ jobs:
        key: ${{ steps.paths.outputs.googletest_CACHE_KEY }}-install
     - name: Build googletest
       if: ${{ steps.paths.outputs.googletest_SOURCE && ! steps.restore_googletest.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests googletest
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests googletest
     - name: Save googletest to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.googletest_SOURCE && ! steps.restore_googletest.outputs.cache-hit }}
@@ -293,7 +297,7 @@ jobs:
        key: ${{ steps.paths.outputs.libdwarf_CACHE_KEY }}-install
     - name: Build libdwarf
       if: ${{ steps.paths.outputs.libdwarf_SOURCE && ! steps.restore_libdwarf.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests libdwarf
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests libdwarf
     - name: Save libdwarf to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.libdwarf_SOURCE && ! steps.restore_libdwarf.outputs.cache-hit }}
@@ -309,7 +313,7 @@ jobs:
        key: ${{ steps.paths.outputs.libevent_CACHE_KEY }}-install
     - name: Build libevent
       if: ${{ steps.paths.outputs.libevent_SOURCE && ! steps.restore_libevent.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests libevent
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests libevent
     - name: Save libevent to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.libevent_SOURCE && ! steps.restore_libevent.outputs.cache-hit }}
@@ -325,7 +329,7 @@ jobs:
        key: ${{ steps.paths.outputs.lz4_CACHE_KEY }}-install
     - name: Build lz4
       if: ${{ steps.paths.outputs.lz4_SOURCE && ! steps.restore_lz4.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests lz4
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests lz4
     - name: Save lz4 to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.lz4_SOURCE && ! steps.restore_lz4.outputs.cache-hit }}
@@ -341,7 +345,7 @@ jobs:
        key: ${{ steps.paths.outputs.snappy_CACHE_KEY }}-install
     - name: Build snappy
       if: ${{ steps.paths.outputs.snappy_SOURCE && ! steps.restore_snappy.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests snappy
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests snappy
     - name: Save snappy to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.snappy_SOURCE && ! steps.restore_snappy.outputs.cache-hit }}
@@ -357,7 +361,7 @@ jobs:
        key: ${{ steps.paths.outputs.openssl_CACHE_KEY }}-install
     - name: Build openssl
       if: ${{ steps.paths.outputs.openssl_SOURCE && ! steps.restore_openssl.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests openssl
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests openssl
     - name: Save openssl to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.openssl_SOURCE && ! steps.restore_openssl.outputs.cache-hit }}
@@ -373,7 +377,7 @@ jobs:
        key: ${{ steps.paths.outputs.liboqs_CACHE_KEY }}-install
     - name: Build liboqs
       if: ${{ steps.paths.outputs.liboqs_SOURCE && ! steps.restore_liboqs.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests liboqs
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests liboqs
     - name: Save liboqs to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.liboqs_SOURCE && ! steps.restore_liboqs.outputs.cache-hit }}
@@ -389,7 +393,7 @@ jobs:
        key: ${{ steps.paths.outputs.autoconf_CACHE_KEY }}-install
     - name: Build autoconf
       if: ${{ steps.paths.outputs.autoconf_SOURCE && ! steps.restore_autoconf.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests autoconf
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests autoconf
     - name: Save autoconf to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.autoconf_SOURCE && ! steps.restore_autoconf.outputs.cache-hit }}
@@ -405,7 +409,7 @@ jobs:
        key: ${{ steps.paths.outputs.automake_CACHE_KEY }}-install
     - name: Build automake
       if: ${{ steps.paths.outputs.automake_SOURCE && ! steps.restore_automake.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests automake
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests automake
     - name: Save automake to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.automake_SOURCE && ! steps.restore_automake.outputs.cache-hit }}
@@ -421,7 +425,7 @@ jobs:
        key: ${{ steps.paths.outputs.libtool_CACHE_KEY }}-install
     - name: Build libtool
       if: ${{ steps.paths.outputs.libtool_SOURCE && ! steps.restore_libtool.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests libtool
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests libtool
     - name: Save libtool to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.libtool_SOURCE && ! steps.restore_libtool.outputs.cache-hit }}
@@ -437,7 +441,7 @@ jobs:
        key: ${{ steps.paths.outputs.gperf_CACHE_KEY }}-install
     - name: Build gperf
       if: ${{ steps.paths.outputs.gperf_SOURCE && ! steps.restore_gperf.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests gperf
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests gperf
     - name: Save gperf to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.gperf_SOURCE && ! steps.restore_gperf.outputs.cache-hit }}
@@ -453,7 +457,7 @@ jobs:
        key: ${{ steps.paths.outputs.libiberty_CACHE_KEY }}-install
     - name: Build libiberty
       if: ${{ steps.paths.outputs.libiberty_SOURCE && ! steps.restore_libiberty.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests libiberty
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests libiberty
     - name: Save libiberty to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.libiberty_SOURCE && ! steps.restore_libiberty.outputs.cache-hit }}
@@ -469,7 +473,7 @@ jobs:
        key: ${{ steps.paths.outputs.libsodium_CACHE_KEY }}-install
     - name: Build libsodium
       if: ${{ steps.paths.outputs.libsodium_SOURCE && ! steps.restore_libsodium.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests libsodium
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests libsodium
     - name: Save libsodium to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.libsodium_SOURCE && ! steps.restore_libsodium.outputs.cache-hit }}
@@ -485,7 +489,7 @@ jobs:
        key: ${{ steps.paths.outputs.libunwind_CACHE_KEY }}-install
     - name: Build libunwind
       if: ${{ steps.paths.outputs.libunwind_SOURCE && ! steps.restore_libunwind.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests libunwind
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests libunwind
     - name: Save libunwind to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.libunwind_SOURCE && ! steps.restore_libunwind.outputs.cache-hit }}
@@ -501,7 +505,7 @@ jobs:
        key: ${{ steps.paths.outputs.xz_CACHE_KEY }}-install
     - name: Build xz
       if: ${{ steps.paths.outputs.xz_SOURCE && ! steps.restore_xz.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests xz
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests xz
     - name: Save xz to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.xz_SOURCE && ! steps.restore_xz.outputs.cache-hit }}
@@ -517,7 +521,7 @@ jobs:
        key: ${{ steps.paths.outputs.folly_CACHE_KEY }}-install
     - name: Build folly
       if: ${{ steps.paths.outputs.folly_SOURCE && ! steps.restore_folly.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests folly
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests folly
     - name: Save folly to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.folly_SOURCE && ! steps.restore_folly.outputs.cache-hit }}
@@ -533,7 +537,7 @@ jobs:
        key: ${{ steps.paths.outputs.fizz_CACHE_KEY }}-install
     - name: Build fizz
       if: ${{ steps.paths.outputs.fizz_SOURCE && ! steps.restore_fizz.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests fizz
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests fizz
     - name: Save fizz to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.fizz_SOURCE && ! steps.restore_fizz.outputs.cache-hit }}
@@ -549,7 +553,7 @@ jobs:
        key: ${{ steps.paths.outputs.mvfst_CACHE_KEY }}-install
     - name: Build mvfst
       if: ${{ steps.paths.outputs.mvfst_SOURCE && ! steps.restore_mvfst.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests mvfst
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests mvfst
     - name: Save mvfst to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.mvfst_SOURCE && ! steps.restore_mvfst.outputs.cache-hit }}
@@ -565,7 +569,7 @@ jobs:
        key: ${{ steps.paths.outputs.wangle_CACHE_KEY }}-install
     - name: Build wangle
       if: ${{ steps.paths.outputs.wangle_SOURCE && ! steps.restore_wangle.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests wangle
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests wangle
     - name: Save wangle to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.wangle_SOURCE && ! steps.restore_wangle.outputs.cache-hit }}
@@ -573,12 +577,12 @@ jobs:
        path: ${{ steps.paths.outputs.wangle_INSTALL }}
        key: ${{ steps.paths.outputs.wangle_CACHE_KEY }}-install
     - name: Build proxygen
-      run: python3 build/fbcode_builder/getdeps.py build --src-dir=. proxygen  --project-install-prefix proxygen:/usr/local
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --src-dir=. proxygen  --project-install-prefix proxygen:/usr/local
     - name: Copy artifacts
-      run: python3 build/fbcode_builder/getdeps.py fixup-dyn-deps --strip --src-dir=. proxygen _artifacts/linux  --project-install-prefix proxygen:/usr/local --final-install-prefix /usr/local
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fixup-dyn-deps --strip --src-dir=. proxygen _artifacts/linux  --project-install-prefix proxygen:/usr/local --final-install-prefix /usr/local
     - uses: actions/upload-artifact@v4
       with:
         name: proxygen
         path: _artifacts
     - name: Test proxygen
-      run: python3 build/fbcode_builder/getdeps.py test --src-dir=. proxygen  --project-install-prefix proxygen:/usr/local
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages test --src-dir=. proxygen  --project-install-prefix proxygen:/usr/local
diff --git a/third-party/proxygen/src/.github/workflows/getdeps_mac.yml b/third-party/proxygen/src/.github/workflows/getdeps_mac.yml
index 5ac16194b14c5b..8a2b04eb04b6e2 100644
--- a/third-party/proxygen/src/.github/workflows/getdeps_mac.yml
+++ b/third-party/proxygen/src/.github/workflows/getdeps_mac.yml
@@ -18,90 +18,92 @@ jobs:
     runs-on: macOS-latest
     steps:
     - uses: actions/checkout@v4
+    - name: Install system deps
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages install-system-deps --recursive proxygen
     - id: paths
       name: Query paths
-      run: python3 build/fbcode_builder/getdeps.py query-paths --recursive --src-dir=. proxygen  >> "$GITHUB_OUTPUT"
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages query-paths --recursive --src-dir=. proxygen  >> "$GITHUB_OUTPUT"
     - name: Fetch ninja
       if: ${{ steps.paths.outputs.ninja_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests ninja
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests ninja
     - name: Fetch cmake
       if: ${{ steps.paths.outputs.cmake_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests cmake
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests cmake
     - name: Fetch zlib
       if: ${{ steps.paths.outputs.zlib_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests zlib
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests zlib
     - name: Fetch zstd
       if: ${{ steps.paths.outputs.zstd_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests zstd
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests zstd
     - name: Fetch boost
       if: ${{ steps.paths.outputs.boost_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests boost
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests boost
     - name: Fetch double-conversion
       if: ${{ steps.paths.outputs.double-conversion_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests double-conversion
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests double-conversion
     - name: Fetch fast_float
       if: ${{ steps.paths.outputs.fast_float_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests fast_float
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests fast_float
     - name: Fetch fmt
       if: ${{ steps.paths.outputs.fmt_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests fmt
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests fmt
     - name: Fetch gflags
       if: ${{ steps.paths.outputs.gflags_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests gflags
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests gflags
     - name: Fetch glog
       if: ${{ steps.paths.outputs.glog_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests glog
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests glog
     - name: Fetch googletest
       if: ${{ steps.paths.outputs.googletest_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests googletest
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests googletest
     - name: Fetch libdwarf
       if: ${{ steps.paths.outputs.libdwarf_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests libdwarf
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests libdwarf
     - name: Fetch lz4
       if: ${{ steps.paths.outputs.lz4_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests lz4
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests lz4
     - name: Fetch openssl
       if: ${{ steps.paths.outputs.openssl_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests openssl
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests openssl
     - name: Fetch snappy
       if: ${{ steps.paths.outputs.snappy_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests snappy
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests snappy
     - name: Fetch libevent
       if: ${{ steps.paths.outputs.libevent_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests libevent
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests libevent
     - name: Fetch liboqs
       if: ${{ steps.paths.outputs.liboqs_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests liboqs
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests liboqs
     - name: Fetch autoconf
       if: ${{ steps.paths.outputs.autoconf_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests autoconf
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests autoconf
     - name: Fetch automake
       if: ${{ steps.paths.outputs.automake_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests automake
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests automake
     - name: Fetch libtool
       if: ${{ steps.paths.outputs.libtool_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests libtool
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests libtool
     - name: Fetch gperf
       if: ${{ steps.paths.outputs.gperf_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests gperf
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests gperf
     - name: Fetch libsodium
       if: ${{ steps.paths.outputs.libsodium_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests libsodium
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests libsodium
     - name: Fetch xz
       if: ${{ steps.paths.outputs.xz_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests xz
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests xz
     - name: Fetch folly
       if: ${{ steps.paths.outputs.folly_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests folly
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests folly
     - name: Fetch fizz
       if: ${{ steps.paths.outputs.fizz_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests fizz
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests fizz
     - name: Fetch mvfst
       if: ${{ steps.paths.outputs.mvfst_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests mvfst
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests mvfst
     - name: Fetch wangle
       if: ${{ steps.paths.outputs.wangle_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py fetch --no-tests wangle
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests wangle
     - name: Restore ninja from cache
       id: restore_ninja
       if: ${{ steps.paths.outputs.ninja_SOURCE }}
@@ -111,7 +113,7 @@ jobs:
        key: ${{ steps.paths.outputs.ninja_CACHE_KEY }}-install
     - name: Build ninja
       if: ${{ steps.paths.outputs.ninja_SOURCE && ! steps.restore_ninja.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests ninja
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests ninja
     - name: Save ninja to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.ninja_SOURCE && ! steps.restore_ninja.outputs.cache-hit }}
@@ -127,7 +129,7 @@ jobs:
        key: ${{ steps.paths.outputs.cmake_CACHE_KEY }}-install
     - name: Build cmake
       if: ${{ steps.paths.outputs.cmake_SOURCE && ! steps.restore_cmake.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests cmake
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests cmake
     - name: Save cmake to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.cmake_SOURCE && ! steps.restore_cmake.outputs.cache-hit }}
@@ -143,7 +145,7 @@ jobs:
        key: ${{ steps.paths.outputs.zlib_CACHE_KEY }}-install
     - name: Build zlib
       if: ${{ steps.paths.outputs.zlib_SOURCE && ! steps.restore_zlib.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests zlib
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests zlib
     - name: Save zlib to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.zlib_SOURCE && ! steps.restore_zlib.outputs.cache-hit }}
@@ -159,7 +161,7 @@ jobs:
        key: ${{ steps.paths.outputs.zstd_CACHE_KEY }}-install
     - name: Build zstd
       if: ${{ steps.paths.outputs.zstd_SOURCE && ! steps.restore_zstd.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests zstd
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests zstd
     - name: Save zstd to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.zstd_SOURCE && ! steps.restore_zstd.outputs.cache-hit }}
@@ -175,7 +177,7 @@ jobs:
        key: ${{ steps.paths.outputs.boost_CACHE_KEY }}-install
     - name: Build boost
       if: ${{ steps.paths.outputs.boost_SOURCE && ! steps.restore_boost.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests boost
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests boost
     - name: Save boost to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.boost_SOURCE && ! steps.restore_boost.outputs.cache-hit }}
@@ -191,7 +193,7 @@ jobs:
        key: ${{ steps.paths.outputs.double-conversion_CACHE_KEY }}-install
     - name: Build double-conversion
       if: ${{ steps.paths.outputs.double-conversion_SOURCE && ! steps.restore_double-conversion.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests double-conversion
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests double-conversion
     - name: Save double-conversion to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.double-conversion_SOURCE && ! steps.restore_double-conversion.outputs.cache-hit }}
@@ -207,7 +209,7 @@ jobs:
        key: ${{ steps.paths.outputs.fast_float_CACHE_KEY }}-install
     - name: Build fast_float
       if: ${{ steps.paths.outputs.fast_float_SOURCE && ! steps.restore_fast_float.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests fast_float
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests fast_float
     - name: Save fast_float to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.fast_float_SOURCE && ! steps.restore_fast_float.outputs.cache-hit }}
@@ -223,7 +225,7 @@ jobs:
        key: ${{ steps.paths.outputs.fmt_CACHE_KEY }}-install
     - name: Build fmt
       if: ${{ steps.paths.outputs.fmt_SOURCE && ! steps.restore_fmt.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests fmt
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests fmt
     - name: Save fmt to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.fmt_SOURCE && ! steps.restore_fmt.outputs.cache-hit }}
@@ -239,7 +241,7 @@ jobs:
        key: ${{ steps.paths.outputs.gflags_CACHE_KEY }}-install
     - name: Build gflags
       if: ${{ steps.paths.outputs.gflags_SOURCE && ! steps.restore_gflags.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests gflags
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests gflags
     - name: Save gflags to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.gflags_SOURCE && ! steps.restore_gflags.outputs.cache-hit }}
@@ -255,7 +257,7 @@ jobs:
        key: ${{ steps.paths.outputs.glog_CACHE_KEY }}-install
     - name: Build glog
       if: ${{ steps.paths.outputs.glog_SOURCE && ! steps.restore_glog.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests glog
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests glog
     - name: Save glog to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.glog_SOURCE && ! steps.restore_glog.outputs.cache-hit }}
@@ -271,7 +273,7 @@ jobs:
        key: ${{ steps.paths.outputs.googletest_CACHE_KEY }}-install
     - name: Build googletest
       if: ${{ steps.paths.outputs.googletest_SOURCE && ! steps.restore_googletest.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests googletest
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests googletest
     - name: Save googletest to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.googletest_SOURCE && ! steps.restore_googletest.outputs.cache-hit }}
@@ -287,7 +289,7 @@ jobs:
        key: ${{ steps.paths.outputs.libdwarf_CACHE_KEY }}-install
     - name: Build libdwarf
       if: ${{ steps.paths.outputs.libdwarf_SOURCE && ! steps.restore_libdwarf.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests libdwarf
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests libdwarf
     - name: Save libdwarf to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.libdwarf_SOURCE && ! steps.restore_libdwarf.outputs.cache-hit }}
@@ -303,7 +305,7 @@ jobs:
        key: ${{ steps.paths.outputs.lz4_CACHE_KEY }}-install
     - name: Build lz4
       if: ${{ steps.paths.outputs.lz4_SOURCE && ! steps.restore_lz4.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests lz4
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests lz4
     - name: Save lz4 to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.lz4_SOURCE && ! steps.restore_lz4.outputs.cache-hit }}
@@ -319,7 +321,7 @@ jobs:
        key: ${{ steps.paths.outputs.openssl_CACHE_KEY }}-install
     - name: Build openssl
       if: ${{ steps.paths.outputs.openssl_SOURCE && ! steps.restore_openssl.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests openssl
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests openssl
     - name: Save openssl to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.openssl_SOURCE && ! steps.restore_openssl.outputs.cache-hit }}
@@ -335,7 +337,7 @@ jobs:
        key: ${{ steps.paths.outputs.snappy_CACHE_KEY }}-install
     - name: Build snappy
       if: ${{ steps.paths.outputs.snappy_SOURCE && ! steps.restore_snappy.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests snappy
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests snappy
     - name: Save snappy to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.snappy_SOURCE && ! steps.restore_snappy.outputs.cache-hit }}
@@ -351,7 +353,7 @@ jobs:
        key: ${{ steps.paths.outputs.libevent_CACHE_KEY }}-install
     - name: Build libevent
       if: ${{ steps.paths.outputs.libevent_SOURCE && ! steps.restore_libevent.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests libevent
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests libevent
     - name: Save libevent to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.libevent_SOURCE && ! steps.restore_libevent.outputs.cache-hit }}
@@ -367,7 +369,7 @@ jobs:
        key: ${{ steps.paths.outputs.liboqs_CACHE_KEY }}-install
     - name: Build liboqs
       if: ${{ steps.paths.outputs.liboqs_SOURCE && ! steps.restore_liboqs.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests liboqs
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests liboqs
     - name: Save liboqs to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.liboqs_SOURCE && ! steps.restore_liboqs.outputs.cache-hit }}
@@ -383,7 +385,7 @@ jobs:
        key: ${{ steps.paths.outputs.autoconf_CACHE_KEY }}-install
     - name: Build autoconf
       if: ${{ steps.paths.outputs.autoconf_SOURCE && ! steps.restore_autoconf.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests autoconf
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests autoconf
     - name: Save autoconf to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.autoconf_SOURCE && ! steps.restore_autoconf.outputs.cache-hit }}
@@ -399,7 +401,7 @@ jobs:
        key: ${{ steps.paths.outputs.automake_CACHE_KEY }}-install
     - name: Build automake
       if: ${{ steps.paths.outputs.automake_SOURCE && ! steps.restore_automake.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests automake
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests automake
     - name: Save automake to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.automake_SOURCE && ! steps.restore_automake.outputs.cache-hit }}
@@ -415,7 +417,7 @@ jobs:
        key: ${{ steps.paths.outputs.libtool_CACHE_KEY }}-install
     - name: Build libtool
       if: ${{ steps.paths.outputs.libtool_SOURCE && ! steps.restore_libtool.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests libtool
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests libtool
     - name: Save libtool to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.libtool_SOURCE && ! steps.restore_libtool.outputs.cache-hit }}
@@ -431,7 +433,7 @@ jobs:
        key: ${{ steps.paths.outputs.gperf_CACHE_KEY }}-install
     - name: Build gperf
       if: ${{ steps.paths.outputs.gperf_SOURCE && ! steps.restore_gperf.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests gperf
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests gperf
     - name: Save gperf to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.gperf_SOURCE && ! steps.restore_gperf.outputs.cache-hit }}
@@ -447,7 +449,7 @@ jobs:
        key: ${{ steps.paths.outputs.libsodium_CACHE_KEY }}-install
     - name: Build libsodium
       if: ${{ steps.paths.outputs.libsodium_SOURCE && ! steps.restore_libsodium.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests libsodium
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests libsodium
     - name: Save libsodium to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.libsodium_SOURCE && ! steps.restore_libsodium.outputs.cache-hit }}
@@ -463,7 +465,7 @@ jobs:
        key: ${{ steps.paths.outputs.xz_CACHE_KEY }}-install
     - name: Build xz
       if: ${{ steps.paths.outputs.xz_SOURCE && ! steps.restore_xz.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests xz
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests xz
     - name: Save xz to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.xz_SOURCE && ! steps.restore_xz.outputs.cache-hit }}
@@ -479,7 +481,7 @@ jobs:
        key: ${{ steps.paths.outputs.folly_CACHE_KEY }}-install
     - name: Build folly
       if: ${{ steps.paths.outputs.folly_SOURCE && ! steps.restore_folly.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests folly
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests folly
     - name: Save folly to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.folly_SOURCE && ! steps.restore_folly.outputs.cache-hit }}
@@ -495,7 +497,7 @@ jobs:
        key: ${{ steps.paths.outputs.fizz_CACHE_KEY }}-install
     - name: Build fizz
       if: ${{ steps.paths.outputs.fizz_SOURCE && ! steps.restore_fizz.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests fizz
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests fizz
     - name: Save fizz to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.fizz_SOURCE && ! steps.restore_fizz.outputs.cache-hit }}
@@ -511,7 +513,7 @@ jobs:
        key: ${{ steps.paths.outputs.mvfst_CACHE_KEY }}-install
     - name: Build mvfst
       if: ${{ steps.paths.outputs.mvfst_SOURCE && ! steps.restore_mvfst.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests mvfst
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests mvfst
     - name: Save mvfst to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.mvfst_SOURCE && ! steps.restore_mvfst.outputs.cache-hit }}
@@ -527,7 +529,7 @@ jobs:
        key: ${{ steps.paths.outputs.wangle_CACHE_KEY }}-install
     - name: Build wangle
       if: ${{ steps.paths.outputs.wangle_SOURCE && ! steps.restore_wangle.outputs.cache-hit }}
-      run: python3 build/fbcode_builder/getdeps.py build --no-tests wangle
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests wangle
     - name: Save wangle to cache
       uses: actions/cache/save@v4
       if: ${{ steps.paths.outputs.wangle_SOURCE && ! steps.restore_wangle.outputs.cache-hit }}
@@ -535,12 +537,12 @@ jobs:
        path: ${{ steps.paths.outputs.wangle_INSTALL }}
        key: ${{ steps.paths.outputs.wangle_CACHE_KEY }}-install
     - name: Build proxygen
-      run: python3 build/fbcode_builder/getdeps.py build --src-dir=. proxygen  --project-install-prefix proxygen:/usr/local
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --src-dir=. proxygen  --project-install-prefix proxygen:/usr/local
     - name: Copy artifacts
-      run: python3 build/fbcode_builder/getdeps.py fixup-dyn-deps --src-dir=. proxygen _artifacts/mac  --project-install-prefix proxygen:/usr/local --final-install-prefix /usr/local
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fixup-dyn-deps --src-dir=. proxygen _artifacts/mac  --project-install-prefix proxygen:/usr/local --final-install-prefix /usr/local
     - uses: actions/upload-artifact@v4
       with:
         name: proxygen
         path: _artifacts
     - name: Test proxygen
-      run: python3 build/fbcode_builder/getdeps.py test --src-dir=. proxygen  --project-install-prefix proxygen:/usr/local
+      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages test --src-dir=. proxygen  --project-install-prefix proxygen:/usr/local